/
watch-cli.ts
159 lines (142 loc) · 4.19 KB
/
watch-cli.ts
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import fs from 'fs';
import chokidar from 'chokidar';
import { bold, cyan, green, underline } from 'colorette';
import dateTime from 'date-time';
import ms from 'pretty-ms';
import onExit from 'signal-exit';
import * as rollup from '../../src/node-entry';
import { MergedRollupOptions, RollupWatcher } from '../../src/rollup/types';
import relativeId from '../../src/utils/relativeId';
import { handleError, stderr } from '../logging';
import { BatchWarnings } from './batchWarnings';
import { getConfigPath } from './getConfigPath';
import loadAndParseConfigFile from './loadConfigFile';
import loadConfigFromCommand from './loadConfigFromCommand';
import { getResetScreen } from './resetScreen';
import { printTimings } from './timings';
export async function watch(command: Record<string, any>): Promise<void> {
process.env.ROLLUP_WATCH = 'true';
const isTTY = process.stderr.isTTY;
const silent = command.silent;
let configs: MergedRollupOptions[];
let warnings: BatchWarnings;
let watcher: RollupWatcher;
let configWatcher: fs.FSWatcher;
const configFile = command.config ? getConfigPath(command.config) : null;
onExit(close);
process.on('uncaughtException' as any, close);
if (!process.stdin.isTTY) {
process.stdin.on('end', close);
process.stdin.resume();
}
async function loadConfigFromFileAndTrack(configFile: string) {
let reloadingConfig = false;
let aborted = false;
let configFileData: string | null = null;
configWatcher = chokidar.watch(configFile).on('change', () => reloadConfigFile());
await reloadConfigFile();
async function reloadConfigFile() {
try {
const newConfigFileData = fs.readFileSync(configFile, 'utf-8');
if (newConfigFileData === configFileData) {
return;
}
if (reloadingConfig) {
aborted = true;
return;
}
if (configFileData) {
stderr(`\nReloading updated config...`);
}
configFileData = newConfigFileData;
reloadingConfig = true;
({ options: configs, warnings } = await loadAndParseConfigFile(configFile, command));
reloadingConfig = false;
if (aborted) {
aborted = false;
reloadConfigFile();
} else {
if (watcher) {
watcher.close();
}
start(configs);
}
} catch (err: any) {
configs = [];
reloadingConfig = false;
handleError(err, true);
}
}
}
if (configFile) {
await loadConfigFromFileAndTrack(configFile);
} else {
({ options: configs, warnings } = await loadConfigFromCommand(command));
start(configs);
}
const resetScreen = getResetScreen(configs!, isTTY);
function start(configs: MergedRollupOptions[]) {
try {
watcher = rollup.watch(configs as any);
} catch (err: any) {
return handleError(err);
}
watcher.on('event', event => {
switch (event.code) {
case 'ERROR':
warnings.flush();
handleError(event.error, true);
break;
case 'START':
if (!silent) {
resetScreen(underline(`rollup v${rollup.VERSION}`));
}
break;
case 'BUNDLE_START':
if (!silent) {
let input = event.input;
if (typeof input !== 'string') {
input = Array.isArray(input)
? input.join(', ')
: Object.values(input as Record<string, string>).join(', ');
}
stderr(
cyan(`bundles ${bold(input)} → ${bold(event.output.map(relativeId).join(', '))}...`)
);
}
break;
case 'BUNDLE_END':
warnings.flush();
if (!silent)
stderr(
green(
`created ${bold(event.output.map(relativeId).join(', '))} in ${bold(
ms(event.duration)
)}`
)
);
if (event.result && event.result.getTimings) {
printTimings(event.result.getTimings());
}
break;
case 'END':
if (!silent && isTTY) {
stderr(`\n[${dateTime()}] waiting for changes...`);
}
}
if ('result' in event && event.result) {
event.result.close().catch(error => handleError(error, true));
}
});
}
function close(code: number | null) {
process.removeListener('uncaughtException', close);
// removing a non-existent listener is a no-op
process.stdin.removeListener('end', close);
if (watcher) watcher.close();
if (configWatcher) configWatcher.close();
if (code) {
process.exit(code);
}
}
}